In reply to:

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For example the 300 WSM is loaded to 62,000 PSI and this load is compaired to a 300 Winchester mag loaded to 52,000.

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I believe that 52,000 is a CUP number and not a PSI number. I don't know what the SAAMI max pressure limit is for the .300 Win Mag but Alliant is showing loads in the 60,000-61,000 PSI range.

-Bob F.

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